General > General Technical Chat
Don't forget to check those thermostat batteries!
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Smoky:
I checked over an HVAC system today that hadn't been serviced in a while.

The batteries in the thermostat were shot!

It's good practice to replace those batteries every year :-+

Merry Christmas!







wraper:
Good practice is to not use alkalines whenever possible.
NiHaoMike:
I think the main design flaw is requiring batteries in the first place. A supercap can easily keep the RTC running for days without external power and the settings can easily be backed up to EEPROM.
IdahoMan:

--- Quote from: NiHaoMike on December 23, 2022, 06:26:13 pm ---I think the main design flaw is requiring batteries in the first place. A supercap can easily keep the RTC running for days without external power and the settings can easily be backed up to EEPROM.

--- End quote ---

Yes. And it's not a flaw, it's a feature.  ::)
Smoky:
These Honeywell thermostats will show a "Replace Battery" message when the batteries go low in voltage but the leaking batteries in the picture still measure 1.48v :scared:

...most people wait until they're told to do something ;)
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